/Engine/Plugins/Enterprise/DataprepEditor/Source/DataprepCore/Public/DataprepActionAsset.h
Insert a copy of the step into the action at the requested index
The index of the added step or index none if the step is invalid
bool InsertStep ( const [UDataprepActionStep](API\Plugins\DataprepCore\UDataprepActionStep) * ActionStep, int32 Index )